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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  07-Nov-2019 by Karl A. Flower (KAF)

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NMI 092L12 Cu8
Name BERG 16, NAHWITTI 2 Mining Division Nanaimo
BCGS Map 092L071
Status Showing NTS Map 092L12W
Latitude 050º 44' 19'' UTM 09 (NAD 83)
Longitude 127º 57' 54'' Northing 5621269
Easting 573032
Commodities Copper, Magnetite, Iron Deposit Types K01 : Cu skarn
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Berg 16 occurrence is located on an un-named northeast-flowing tributary of the Nahwitti River, approximately 10 kilometres north-northeast of the community of Holberg.

Regionally, the area is underlain by northwest-trending belts of basaltic volcanics and carbonate sedimentary rocks of the Upper Triassic Karmutsen and Quatsino formations (Vancouver Group) and mafic volcanics and sediments of the Upper Triassic to Lower Jurassic Bonanza Group (Holberg volcanic unit, Nahwitti River wacke and Parson Bay Formation). These volcanic and sedimentary rocks have been intruded by granodioritic rocks of the Early to Middle Jurassic Island Plutonic Suite.

Locally, Karmutsen Formation andesites containing two narrow bands of limestone near the top of the unit are overlain by Quatsino Formation limestone. Younger Bonanza Group volcanics are found to the west and southwest. Skarn is found near the top of the Karmutsen rocks, where minor chalcopyrite occurs with massive magnetite. In the Quatsino limestone, minor pyrite and chalcopyrite have been noted close to intrusive contacts (Island Plutonic Suite?). Disseminated pyrite is present in one of the Karmutsen limestone bands. Oxidation of chalcopyrite to malachite is common.

In 1989, a rock sample (33068) of magnetite from epidote limonitic skarn assayed 0.209 per cent copper (Assessment Report 19190).

During 1968 through 1970, Continental Cinch Mines Ltd. completed programs of prospecting, soil sampling, geological mapping and a 16.0 line-kilometre ground magnetic survey on the area as the Berg 1-178 and B 1-12 claims. In 1989, Mishibishu Gold Corp. completed a program of geological mapping and geochemical sampling on the area as the Nahwitti 1-4 claims.

EMPR ASS RPT *1771, 2189, 2834, *19190
EMPR GEM 1970-254; 1971-324
EMR MP CORPFILE (Gladiator Resources Limited)
GSC MAP *4-74; 1552A
GSC OF 9; 170; 463; 722
GSC P 69-1A; 72-44; *74-8; 79-30
CJES 18, p. 1; 20, p. 1, Jan. 1983
Carson, D.J.T. (1968): Metallogenic Study of Vancouver Island with
emphasis on the Relationship of Plutonic Rocks to Mineral Deposits,
Ph.D. Thesis, Carleton University, Ottawa
Sangster, D.F., (1964): The Contact Metasomatic Magnetite Deposits
of Southwestern British Columbia, Ph.D. Thesis, University of
British Columbia